Effect of heating temperatures on AlSi coating microstructure and fracture during hot-tensile tests

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Abstract

In this article, the fracture behavior of different AlSi coating micro-structures is
investigated. By changing the heating temperature, different AlSi coating micro-structures are obtained, due to varying diffusivity of iron. To study the fracture behavior of different coating micro-structures, uniaxial tensile tests are conducted at 700 C. The hot tensile test involves heating the as-coated press hardening steel in a furnace to heating temperatures of 750, 920 and 1000 C for 6 minutes of dwell time, after which the sample is cooled to the deformation
stage at 700 C. In this stage, the samples are uniaxially deformed for a fixed 20% macroscopic strain followed by cooling to room temperature. After the test, the coating micro-structure and fracture pattern are inspected under the microscope. For samples heated to 750 and 920 C, coating fracture is observed; however, for samples heated to 1000 C, no coating fracture is observed during the tensile deformation at 700 C. The AlSi coating micro-structure, after
heating at 1000 C becomes suffciently ductile to withstand 20% strain at 700 C. The same micro-structure, however, fractures during uniaxial tensile deformation at 600 C.
Original languageEnglish
Article number012018
Number of pages7
JournalIOP Conference Series: Materials Science and Engineering
Volume1157
DOIs
Publication statusPublished - 2021
Event40th International Deep Drawing Research Group Annual Conference, IDDRG 2021 - Virtual Conference
Duration: 21 Jun 20212 Jul 2021
Conference number: 40
https://www.iddrg2021.uni-stuttgart.de/

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